For many, the Sudarshan Samhita is a "book of power." Its hymns are chanted to:

Unlike standard astrological texts that focus heavily on planetary calculations and house lords, the Sudarshan Samhita is often celebrated for its focus on (planetary combinations) and Phalita (results). It bridges the gap between strict mathematical astrology and the intuitive, result-oriented wisdom found in the Puranas.

You can find digitised versions and extracts of the Sudarshan Samhita and its associated prayers (like the Kavacham) on various digital libraries:

This "shield" or armor prayer is one of the most frequently searched sections. It is used by practitioners to seek spiritual immunity from black magic, planetary afflictions, and fear. Availability and Format

Because it is a specialized and ancient text, a single, complete "book" in modern PDF format can be difficult to find. Instead, it is usually available as digitized manuscripts or collections of its most famous stotras: